Machine for spirally grinding interchangeable spirally-ground bottle-necks and stoppers therefor.



nnmm nd 9., 60. E om.. C 9B HH 1E l m ,w a .E 2 Vmn... Mm ,am B a.. am D 8.4.. .rO N t n U n nA m m a.. M m M v. u mmm NENM OLEY Mmmm E Nmmu OGRE CRPE .E01 Mmmm .I u CGmM m n m I n n m M mY @a B n0 S m 4 e U m 2, .u c 4. W .A 1 M 9 C. M. CONRADSON. I MACHINE FOR SPIRALLY GRINDING INTBRCHANGEABLE SPIRALLY GROUND BOTTLE NEGKS AND STOPPERS THEREFOB. APPLIGATION FILED MAX 16, 1906 914,243, Patented Mar. 2, 1909 4 SHEETS-SHEET 2.

inventan nrfLd/b/zadsan l By his Atfornejf Witnesses: MM-

inventan m D; Nus wm um Mm Nm no CR .n MN ...I G om m .I m A m S E o P m m `AND STOPPERS THBREPOB. APPLIUATION FILED MM 16.1906

Wifnesses A@ ff@ l G. M. ooNRADsuN. f Y Y MACHINE POE SPIBALLY GRINDING INTERGH'ANGEABLE SPIRALLY GROUND BOTTLE NEGKS AND sToPPBRs THERBFOR. A APPLICATION ILED MAY 16, 1906.

' YPatented Mar. 2, 1909.

- 4 SHEETS-SHEET 4.-

In ventor vzwdr f'azznz/ By his Attorney;

Witnesses:

iImmun) Asiniirias PATENT oFFcE.

Y GQHRAD M. CONRDSON,O MADISON, WISCONSIN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO PRECISION GLASS GBINDING MACHINE COMPANY, OF SIOUX FALLS, SOUTH DiiKOTA,

with which it-Was origin a cosrona'rron orsonfrn minera.

CHINE FOR PlBALLY GBINDIG INTERCEANGEABLE BPIRALLY-GBOUND BOTTLE- y fR'ECKB ANDSTOPPERB THEREFOB.

'To all maycmem: r

Beit'knuwnthat I, CONRAD M. CoNnADsoN, a citizen of .the UnitedStates, residing 'in L Ivadison, iexthe .county of Dane and State of Wisconsin, have invented certain-new and useful Improvements in Machines for S irally Grinding Intercha Ground Bottle-Noske and. Stoppers Therefor, of which the following isY a specification;

Thisinvention relates to a machine for making interchangeable, s irally ground, (preferably truncated, cone-s sped) interiors of glass bottlenecks and. sprally rround, (preferably. truncatedZ cone-shaped5 exteperstherefor.

ners -of glass st f-'ihe general o ject of the invention is to 4o bviate the cumbersome and undul expen. Qsrve successive operations of the ol final result of which art, the was, and is, the productionof ground-glassjomted bottle-necks and' etopifs, any ttle other 'than the articu ar v ttle allg" mated, and of which no bottle pro erly fits any other stopper than the particular one with which itwas originally mated.

- 4he relates to bottles and Stoppers, has long been, and is, substantially as follows:-The truncated, conesha ed interior surface of the glass bottle-neng, .and thevtmncated, coneshaped exterior surface ofthe glass stopper,

vwhether blown'or formed in molds, are mitiall untrue with reference to the geometrica axis ofthe truncated cone; that is, to the lengthwise axes of the bottles and stoppers. The said surfaces are also more or less rough; that is, of a more or less irregular,

in the proper rior art is to ive approximately orm to the said surfaces. In the pilg! mounted in a machine has been used. .his tool is cone-shaped, and generali consists of s'wooden core spirally wrappe with 'sheet iron. The workman Fwith one hand holds the bottle on the free ,end :of the rotating lap, moving the bottleneck backend o rth on the la tudinally, while withl the other han he feeds between the lap and bottle-neck interior an abrasive mixture. This initial manual lappingf 'operation is usually carried on .longi- Specification o! Letters Patent. pluma meld my ze, isos; .sum Na. sinus.

' I until the desired ngeable Spira y- -of which no stopper pro er1 fitsground-glass Vljaint-forming art, asV it hill-and-dale condition. The first operationl 'Patented mmh 2, 1909.

' uantity of bottlemecks has been lpped.. qThe Stoppers are primarily put in a rotating chuck and roughed out by means' of a --lap, enerally consisting of a copper-faced strip 0% wood one end of which is mechanically held, the workman with one hand pressing the free end of this lap against the rotating stopper surface while -feeding with the other hand abrasive matenal between the stopper and the lap Leavin thesto pers, seatim', in the chuck, the wor 1an ta es the bottles, seriatim, and holding a bottle, one hand, with the other hand feeds abrasive mixture between the o posed surfaces of the stopper and bott eover the stopper until the joint-forming surfaces -of the bottle are mated. On the best put each stopper in its ottle, after the lapping operations and oscillatc them in relation one -to another by hand to vperfect the tightness of joint. In this old art, said surfaces are in fact used as tools for their own production, one surface modifying the other in such wise that there is no reasonable :likelihood of interchangeable Instability. Consequently, the further ractice is to tie each stopper to its own bott e, so as to keep them together` for storage and transportation, and for cleaning before shipment. In shipping, it is also usual to insert a bit of paper be tween each bottle-neck and its stopper, so as to prevent breakage. tailers also have to `keep such bottles and Stoppers in -mat-ed pairs, -as received. the old process, as a general rule,I the said surfaces are neither properly round nor straight; and are therefore .exceedmglyapt to stick together; and the joints are not tig t to the proof alcohol test except by careful manual rinding of each stopper in its own bottle. the gro'und-glass joint-art as it relates to botof is comparatively restricted, such bottles and Stoppers being unduly expensive and frequentl unsatisfacto over, t at no one of said surfaces-is uniformly finished, .-each surface .being irregular at the Theadvantages orf :the present invention are, elimination of the expense of -time and neck, moving the .bottle-neck back and forth' grade of work it is lfre uently the cust'om to.

The jobbers and -re.

he practical resultant condition of It 1s 4a fact', more-A Vtis tles and Stoppers is'that the ield of use therelahoroi' the old manual "lapping operuliom mul thc printer-tion of intel-changealzlc b01- tlencc-zs und stoppcrs. which may' he shipped The main factors in the machine herein lc- .scriicd for use in making my interchangeable ground-glass bottle-necks and strippers of the usual truncated cone shape, are a rotatable glass-cumin"f pencil having a conical woming cnd and a work-holder arranged` face or" the glass to be ground; and a controlling mechanism, operable at the will of the operator, to ell'ect one or more uniform, spiral cuttings of the glass surface to be treated. lf more than one such cutting is desired, as will be usually the case, the spiral cuttings are preferably to overlic and intersect one another'. The longitudinal axes of both the pencil holder and Work holder are inclined one to the other and to a plane (indicated in l1`igure 3 by the dotted line o o) which cuts the longitudinal axes of both the pencil holder and Work holder; and that conical surface of the pencil which is in contact with the beveled surface of the work and also the beveled surface of the work itself are in line with one another; that is, in another plane which intersects the plane indicated by the dotted line o-o, so that th'c beveled grinding conical surface of the pencil may contact with the correspondingly inclined surface of the work during cach rotation and reciprocation of the conical Working end of the pencil. The described arrangement of the conical working end of the pencil and work, including the Work holder and the pencil holder, is wholly new with me, in so far as I am advised.

In the drawings accompanying and forming a part of this s eci'lication, Fig. 1 is a side view of a practica le embodiment of a form of the present invention; Fig. 2 is a plan View thereof; Fig. 3 is an enlarged View of one of the work-holders shown on ahorizontal plane, and one of the pencil-holders and pencils in plan;1*`ig. 4 is a longitudinal section of one of the work-holders on a plano in about the line 4-4 of Fig. 5, looking in the direction of the arrow; `Fig. 5 is a view in about the line 5-5 of Fig. 4, looking in the direction ofthe arrow; Fig. 6 is a front view of the workholder; and'Fig. 7 is a section o the workholder in a plane horizontal to the axis thereof, and at about right angles to the position illustrated in Fig. 3.

The form of machine herein illustrated enibodies a frame Work having a base ortion 10, side members 11 and front mem er 12,

which form supports for the various parts oi the mechanism. Each end of the frame is y n i shown provided `with ways 13 upon which a scm: itely and usen nudist-nmumtcly. smc

pencil carriage 14 is slidably mounlc` rind upon which pencil carriage any desiree ...fubcr, one or more, of pencil carriers are mounted, each supported by a pair of standards 15. 15, which are setat an angle to the line el' reciprocation of the carriage. 'lhese standards arc-provided with suitable bearings in which :i pencil-carrier 16 is nnulnted, which may be driven by some suitable means, as. for instance, a belt. 17 driven from a pulley and some suitable source of power, not shown. 'The peln-il-carrier or tool spindle 16 is shown located on a horizontal line and having some ssuitableform of chuck 18 in which a glasscutting pencil 19 is mounted. preferably of carhorundum.

ln the present illustration the relative movement between the pencil and the glass to be operated on (here shown in the form el a bottle.) is produced by reciprocating the carriage 14 upon its ways. This in the resent irrtance is dene by means of a driver or eccentric'- shaft 20 driven by means of a pulley 21 from some suitable source of power. not shown. The shalt 20 has fast upon it :i pair of eccentrics 21' embraced by eccentric straps 22 connected by eccentric rods 23 to the carriage. The resent means of connec- The pencil is tion are ordinarily or adjusting thc place of reciiluocation of the carriage 1-1 on its ways 13, and comprise a shaft '.24 mounted in suitable bearings 25 upon the carriage, this shaft 24 being provided with a paix ol' eccentrics 24 embraced by eccentric straps 23. Shaft '24 may be rotated by means of a worm wheel 226 fast upon it and meshing with a worin 2T stepped m a bearing 28 in the carriage and controlled by means of a hand wheel 29. By this means the forward and backward limits of the strokes of the pencil or pencils may be regulated, so that after they are individually adjusted and become gradually worn amg' in use they may be advanced in unison toward the working position by merely rotating the Worm 27, and the saine advantage obtains if only one pencil is used.

In -the present form of machine, the lei'igthwise axial line or axis of rotation of pencil 19 is at un angle to the right line path of traverse of pencil-carriage 14, this angle being equal to one-half of the centaine-l angle of the irusto-conical surface to be ground; and consequentl)v the effective operation ef the ma chine is to rind the glass into a frustoconical shape, w ether the glass surface t0 be ground is the'frusto-conical interior of the bottle-neck or the {ruste-'conical exte-z rior of the stopper. But it is to be observed that if the work-holder and tool were mounted so that their axesof rotation were in the same plane, then the surface ground would be cylindrical instead of conical... In .the preferred arrangement, the end 2 8 of the pencil has a conical point, which shape is automatically maintained by the grinding process, as will he evident from Fig. 3, wherein 29 indicates :that part of the slanted surface of 4the beveled point which is assumed -to come :lil-st into contact with the glass to begrofund, and such surface 29 'is 'at an angle tothe quent-ly in the rotation 'eled point is kept true.

the Workin a slide rest is mounted intransverse means of a rocking lever 32 pivoted to one ami 33 extending from the machine frame, .a suitable link 34 connecting the lever to said slide rest.' is to position the pencil and work in l relation to another so as to bring the pencil andglass together for grinding. The other end of the lever carries a roll which worm 40 upon the shaft 20, and driven isi-the present instance by means of a pulley y21, which will be driven by means of a belt from some suitable source of power. ln the resent instance, the belt is illustrated in ig. 1 by the dotted line 43, and runs over the ley, similarly indicated in Fig. 1 by 44, w ich pulley is fast upon the drivin shaft 45, havin upon it fast and loose pu leys 46, 47.

ounted u on the slide rest 30 is a slide or carriage 501W ch is -movement in the line of reciprocation 'of the slide rest 53. The slide rest is shown as car- 'machine ready for operation on different sizes of work and with different sizes of -penf c Each of the work-holders in the present' illustration supported by a pair of stands axis of rotation of the work-holder. 'Conseof the pencil, its bevl This automatic iormation of the beveled pencil poi-nt is of im of the frustoconical surfacesf llt is to be noted, also, thatv the angle between the. the pencil and wonk or holder or spindle isillust-rated herein, 'where'- 31 upon the machine frame, and suc-h wa 4s slide rest 30 is fed cross-wise oi the line of reciprocation of the pencil-carriage 14 by The purpose of this ad'ustability lder one runs in a cam groove 36 of a wheel 37, which wheel 'is' carried by a shaft 38 having fast upon it a worm wheel V39 in mesh with al guided by ways 51'for 83 in its longitudinal movement.

spective standards 76,- 77, and. afford ball races for suitable series offballs 80, 81. The

body portion 82 of the Work-holder is shown vas having fast at the front end, thatl is, the end toward the grinding pencil, a ring 780 constituting the other member of the ball race .for 'that end of the device. At the other end of 'the bodyis mounted a ring 83 having a freeit upon the bodyY portion. lt also forms the other member for the race of balls 81. A ring 84 is fast upon' said body' portion and forms an abutment for the ring The 83 is held against the 1ing .or collar 84 by means oi a washer 85 whicii'is pressed in position by means. of a series'.of sp o's 86 mounted in sockets in a collar 87, which is.,

held to the body portion by means of suitable set screws'88. A ulley 90 having a bearing portion 91 is eel;r mounted upon the body portion 82, and is held between the col- 'lar 84 and the collar 89. Some suitable belt will be run over the pulley 90, and its motion be communicated to the body of the Work-holder by means of some suitable friction clutch when it is desired to rotate the work; and the fiiction clutch will be released when it is desired to bring the work to a rest.

There is also provided a suitable brake for stopping" the rotation of the work-holder when the clutch is thrown out. Such clutch in the present instance embodies an engaging member 92 for engaging the face 906 of the pulley, which member is in eng gement vith a block93 mounted within the body. ,The block has grooves 94 upon two of its sides, Within each of which there is located a slide block 95 fastenedby means of a screw 96 to the clutch member 92. There are also a. pair' pins 97 `Worlning in slots 98 in the block 93 and which pass through slots in the .bodv l rtionl 82 andengage the clutch member 92.. xtension springs 99 are inte osed betweenthe slide blocks 95 and the heav end 100 of the i 'Work-holder. This will' normally" tend to keep theclutch -in its clutchingor engaged position; For the purpose of withdrawing the clutch, a suitable lever 101 is carried by pivots 102 mounted in lugs 103 of the base of the work head, which lever carries a pair of pins 104 runnin in a thelclutch member. The lever may be pri vided with asuitable handle 106 whereby the clutch member may be moved forward-and back as occasion may demand. It will be,l seen that when theclutch lever 101 is moved so that it will also reciprocate the block 93 through which the pins 97 pass, there will be an amount of free or lost motion between the clutch member and the block 93, 5 f, --Extension springs 11G are mounted'within circular groove in.

recesses 111 of the block and tenzl to press the same forwardl such springs engaging a ring 112 at the ack of the work-holder, which ring is held in place within the body b means ofsuitable set screws 113. The spring abuts a `shoulder 114 for the purpose of'pressing the block forward.- This is for the purpose of normally tending to open the chuck Jaws 115 situat-ed wit-hui the slideways 116 in the head 100. Each of the chuck jaws has a slanting face 117 which will be engaged by an obliquely disposed jaw operating on arm 118 which is fastened in the present instance by means of a screw 119 to the block 93, so that upon the backward movement of the block with the clutch meinber, when this is moved into its clutchinev engagement with the pulley, the jaws wi l be advanced, and when the clutching member is VWithdrawn from the ulley the jaws will be drawn from their bott e-engaging position. For the pur ose of preventing the arms 118 from s rea ing apart, a ring 120 may be secure to their forward ends,whicli not. only will prevent their spreadin but act as a front stop and also-a steadgy the jaws. For the purpose of bringing the Work-holder quickly to a rest upon the re ease of the clutch and of the chuck,y a suitable brake may be employed, which in the present instance is shown as a brake-slioe`121 carried by an arm 122 pivoted at at one end of the work-holder and engaging a friction surface carried by a ring or band 124 at the other end. The arm is traversed by an upstanding pin 125 carrying an extension spring 126 which bears u on the arm and uplon an abutment'in the orm of a nut 127. T e lower part of the arm 122 is given a cam formation at 128, which cam engages a roll 129 carried by the lever 101, so that when this is in the position to chuck-the work and close the friction clutch the brake will be held away from the friction face 124 but 'u on rocking the lever for withdrawing the c utch members and unclutching the work vthe arm will be permitted to nioveresponsive to the spring 126 and the spring will be applied to the friction face and quickly bring the work-holder to complete rest Y In the construction illustrated, all the bottles being acted upon will be brought to the l Working position of the pencil si'iiiultaneously, and the Work proceeded with until completed.

when all the bottles will be moved out of the machine brought to a teni orary stop,

ing device for enga occupies a central position within the neck and out of contact with any portion ol .lie surface of the bottle. At the. same time a belt shipper 141 will be. actuated for moving the belt trom the fast to the loose pulley, thc beit shipper having fast to it a lever 142. which lever has an abutment lace 143 lor engaging a trigger in the nature of a bcll crank lever, it having one portion 144 for engaging the face 143 and an arm 145 for the nement of a linger or abutment 146 earricd by the shift 3S. .-i spring as 14T may be employed for pressing the cngaginfr end 144 ol' a trigger into engagement with the abutment 143. By this means, alter the bottles have been brought to iin'idlc position so far as the grinding is concerned. the belt will be shifted and the rotation ol' the' wheel 37 stopped, so that the attendmt may have as long a time as is necessary for the changing oi the bottles; when it is again desired to start the mechanism, the handle 147 may be called into use for shipping the belt to its active position. The bottles will be removed by actuating the release mechanism before each work-holder, and the worleholders and the pencil-holders need not be stopped during such change oi" boit-les, except vthat eac-li worlz-holder will he stopped during the time that its individual bottle is being changed.

Machines embodying in v invention muy be made in various forms other than that shown, und with :is iininy or :is few glosscutting pencils :ind \\'ork-holdersus muy he found convenient. This machine is eiiicient for grinding the Frosio-conical stopper-s required, n proper form of stopper-holder being substituted for the bottle-holder.

The machine hcrein illstrated is one of several forms which muy be. employed in carrying out in v new method of spirali) grinding ground glass bottlc-necks und ground glass stoppcis therefor: und l do not herein claim said method, :is itforius the subjcct-nnitter of, and is claimed in, my copending application Serial No. 385,475. said iapplication also showing my new spirallv ground glass bottle-necks und glass stoppeis therefor which may be produced by the inachine herein described. `quid product is claimed 1n sind application Serial i\o. $5,475.

. Nor do l claim herein mv new gloss-grinding pencil, :is that forms the subject-immer of,

i und is claimed in, in v cti-pending application engagement with the grnidmg pencils and 2 Serial No. 404,836.

ihile in v invention has been described in relation to the production of interchange# nhl).v mated, ground glass bottles und ground glass Stoppers therefor, it is also highly uscful in the grinding of the joint-forming surfaces of the bottle-necks' and Stoppers of porcelain and other structures of hardened plastic material.

What l claim is:-f

v1. .Ina machine for. interchange- Work-holder; a grinding tool carried by the tool-holder; means for effecting a rotary' movement of the grinding tool and workholder one in relation to the other; means forcflecting, during said rotary movement, a reci rocative movement of the tool and work h01 er one in relation to the other, in a line at an angle to the axes of rotation of both .the tool-and work-holder.

.2. .1n a machine for grinding interchange- .ably mated bcttle-necxsand stop ers thereltfonthe combination of a pencilholder; a work-holder; a grir ing pencil carried by said pencil-holder and provided with a con- -lcal working surface; meansfor edecting a rotary movement of the pencil and workholder, one in relation to the other; and

means for cii'ecting, duringsaid rotary movementfareci rocative movement of the penciland wor -holder, one in relation to the other,.in apath at an angle to the-axes of ytheir rotation; the pencilzand work-holder Ibeing arranged with their axes of rotation at :im angle one tothe other; and the conical grinding suraceo the .pencil being adapted inthe 'operation 'oi the machine, to rotate and to'traverae -the face of the Work being operated on, .-simultaneously, whereby the correct .conical shape of the conical grinding surface-.and of the Workar'. maintained.

. .3." In arnachinefiorgrinding interchangeably .mated .bottlenecks-and Stoppers therezfor, the combination offa pencil-holder and a saidzpencil-holder and formed et an end wit aeonical grinding -snrface which, with the n 440 vcontiguous surface of the body of the pencil, i 'is so workable that the conical grinding'surface progressively developed throughout theperiodoi .use-ofthe pencil; means for eiiecting. a rotary movement of the pencil 45.and'vi=ork-holder one Iin relation to the other; i .means l:for `eiecting, during said rotative movement, a:V reci rocatoryfmovement of the -tool'and `Work-ho der one in relation. to the other; -andmcans for reciprocating said pencil-holder toward and from the work-ho der, in a ath at a constant angle to the axes of `rotation of the Work-holder and pencil-holder.

'4. Ina machine for grinding interchangeably mated bottle-necks and Stoppers therefor, the combination of a rotata e grinding pencil having a conical grinding surface with a rotatable work-holder; means for rotatlng the pencil; means for rotating the lworkholder; automatic means for reciprocating the 50 pencil and work-holder, one in relation to. the I other, xduring theirl rotary movements, -1n a line atan angle to their axes of rotation; and means for moving the conical grindmg suraceofthe pencil and theework-holder:latorally one in relation to the other, 1n a path work-holder; a grinding pencil carried by' 4at an angle to their axes of rotation during their rotation. 'y

In a machine for grinding interchangeably mated bottle-necks and Stoppers therefor, the combination, with a rotatableworkholdingspmdie, of a rotatable tool-spindle; a grinding pencil in said tool-spindle; and means for effecting relative reciprocation between these spindles, in a line at an angle to the axes of their rotation; the working conical end of the pcncil being adapted, in the operation of the machine, to rotate and reciprocate, simultaneously, in the plane of the surface of the work being operated upon, whereby the correct conical form of the tool is maintained and the correct conical form of the Work is also maintained.

6; In a machine for grinding interchangeably mated bottle-necks and Stoppers therefor,`the combination of a tool-holding spindle with a Work-holding spindle; means :for bringing said spindles into rotative relations one to another, and means for bringing the s indles to a temporarlyustop and carrying t e spindles ont of wor g relations one to another.

7. In a machine for grinding interchangeably mated bottle-necks and Stoppers therefor, the combination of a grinding pencil having a conical grinding surface with a work holder, the pencil, and work-holder being mounted with their axes of rotation at an angle one tothe other; means for effecting rotation of the pencil; means for effecting rotation of the Work-holder; automatic means for eii'ecting the reciprocation of the pencil and work-holder one in relation to the other, during the rotative movements thereof, in a line at an angle to their axes of rotation; and means for effecting a feeding movement of the conical grinding surface of the pencil and of the work-holder, one in relation to the other, in a path which is at a constant angle yto their axes of rotation.

8. In a machine for grinding interchangeably mated bottle-necks 'and stop exs therefor, the combination with a grinding pencil having a conical grinding surface and means for reciprocating the same; of a work-beider; means for carrying the work-holder and cmbodying a slide and slide-rest, cach movable transversely of the path of reciprocation of the pencil; means for reciprocating said slide-rest; and means for adjusting the position of the slide upon the slide-rest.

9. In a machine for grinding interchangeably mated bottle-necks and Stoppers therefor; the combination with a slide; means for reciprocating the same; a series of rotary tool-spindles carried thereby; a transverseiy 'reciprocating slide; a series ol work-holders carriedV thereby; a cam having faces for reciprocating said work-.holder slide-fog bringing-all the work quickly into working engagement with the tools and for quickly returning the slide for moving all the work out of working engagement with the tools.

I0. ln a machine for grinding interchangeably mated bottle-necks and Stoppers therefor, the combination with `a rotary workliolder of rotary means for holding a grinding pencil having a conical grinding surface; means for reciprocating the conical grinding surface of the pencil across and in uniform contact with the face of the work heldin the work-holder, in a ixed`nath at an angle to the axes of rotation of the work-holder and pencil.

11. In a machine for grinding interchangeably mated bottle-necks and Stoppers therefor, the combination with a rotary Workyholder of rotary means for holding a grinding tool; means foi' .reciprocating the grinding tool across the surface and in uniform contact with tlie face of the work held in the workliolder, in apath at an angle to the axes of rotation of the work-holder and pencil; and means for effecting a feeding movement of the grinding tool and work-holder, onein relation to the other, (hiring the reciprocation of the conical grinding surface across the face of the Work.

12. In a machine for rinding interchangeably mated bottle-nec s and Stoppers therefor, the combination with a workholder of a rotary tool-spindle; means for reciprocating said spindle toward and from p the Work-holder in a path at a constant angle to the axes of rotation of the wor holder and tool-spindle; an abrasive pencil in said spindle, and means for moving the Work laterally into and out of the working zone of the pencil. I

13.. In a machine for grinding interchangeably mated bottle-necks and Stoppers therefor, the combination of a work-hol -spindle with' work-clamping `jaws carri thereby; al clutch for rotating said s indie; Y means for controlling said clutch an jaws;

'a brake for engaging the spindle to stop the same; and means for drawing the bralfe out ofen agement with thespmdleyvhen in the Iamping and clutch-operating position.

1 4. In a machine for rinding interchan eabl mated bottle-'nec and stop ers. there or,` t e .combination of a work-ho spindle with clamping jaws carried thereby;

a clutch for rotating said s indle; means for controlling said clutch an jaws; a s ri pressed brake for engaging the spinile Ato .sto the same; and meansfor dran-inv the when in the jaw-clamping and bra e out of 'engagement with the s indie vLitcho erat' osition.

P15. llliligla machine for .interchangeably mated bottle-nec s and stoppirs therefor, the combination with a grin g tool and means for actuating the same, of s .work-holder adjacent thereto and embody'- ,ing means for clampin the work, means for rotating the work-hol er, and also embodying a friction clutch and means for actuating the friction clutch and Work-holder.

16. In a machine for ciz-aiigeably mated bottle-nec s and-stop ers therefor, the combination with a grin'ing pencil of a work-holder comprising a, body ortion; bearings for the same, one' of which arings is floating and s ringressed; a pulley loose upon said bo y an having a clutch-engagin face; a clutch member; a block inounte within said body ortion; radially sliding jaws carried by t e said block; a clutch engagin said block; means forl advancing the clutcii member into engagement with said pulley; springs normally tending to force sai block and fingers into the opening position of the same, and means normally tending to close the clutch.

17. In a machine for Grinding; interchan eably matedbottle-neclm and stop ers there or, the combination with a grinding tool of a work-holder chuck comprising a body portion; bearings for the same, one of which bearin is iioating and springpressed; a pu ey loose upon said body and membera block mounte within said body portion; radially sliding jaws carried by the ody; jaw-engaging fingers carried by said for advancing the clutch member into engagement Awith said pulle springs normally tending to force saidb ook and fingers into the opening position of the same; means normally tending to 'close the clutch; a brake for engaging a portion of the spindle for sto pin the rotation of the same and contro ed y the clutch and jaw-controlling mechanism. A

18. In a machine for gign 4 chan eably mated bottle-nec a'nd stop ers there or, the combinationvwith a grin pencil and means for actuating the same, o a work-holding spindle adjacent thereto and embodyingmeans for clanpingtne work; means for rotatin the spin e and embod ing a clutch an means for cone-uncut;r actuating the clutch and lthe* work-clamping 11168118. l' t 19. In a machine for inten changeably mated bottle-nec and stop rs therefor, the combination with a grin tool of a work-holding chuck `comprising a body portion; a pulley loose upon saidbody and having a clutch-eng Ging face; aeclutch member; a block mounts within said body portion; radially sliding jaws cariied'bythe odi; jaw-engaging ngexacarxie blo Ine'ansy of connection: between-the the clutch member into j agement with said1 -pu1ley; meansV norm Vy .to

block; a clutch engaging said block; meansV interl 'clutch and said block; means for advancing rinding inter-` having a clutch-enga face; a clutch by and' las I force said fin ers into an open position; and i of said spindle and controlled by the clutcl1- means norma ly tending to close the clutch. E operating lever. 10

20. In a machine for Grinding inter- Signed atv Nos. 9-15 Hurra)v street, New changeably mated bottle-nears and stop ers l York, N. Y. this 11th dav of Mov, 1906. '5 therefor, the combination with a grin( ing CONRAD 3l. CONRADSON.

device of a work-holding spindle; a clutch Witnesses: for rotating the sume; a lever for controlling l Crus. LYON RUSSELL,

,said clutch; a. brake for stopping the rotation i F. E.y BoYcE. 

